JP2653498B2 - Multi-beam antenna device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention is mainly used for a radar apparatus, and performs multi-processing based on required processing for element signals of each antenna element constituting an array antenna. The present invention relates to a multi-beam antenna device for forming a beam.

(Prior Art) Generally, in a radar apparatus, when a single antenna forms a multi-beam with small gain reduction on an azimuth plane and an elevation plane, an antenna apparatus as shown in FIG. 9 is used.

That is, this antenna apparatus has a plurality of azimuth plane circuit boards 11 l to 11 N that form orthogonal multi-beams in the azimuth plane.
And two or more stages of elevation plane circuit boards 12l to 12M that form orthogonal multi-beams in the elevation plane are mainly composed of two parts.

Among them, the azimuth plane circuit boards 11l to 11N are each composed of M array antenna elements arranged at equal intervals in the same direction.
a _{l to} a _M , and each of these elements a _{l to} a _M
Through respective phase shifters b ₁ ~b _M high frequency signal which is derived from the input to the Butler matrix circuit c, to form an orthogonal multibeam the M in the azimuth plane through the Butler matrix circuit c.

On the other hand, the elevation plane circuit boards 12l to 12M are configured to receive the multi-beam signals of the same column of the azimuth plane circuit boards 11l to 11N, respectively. The signals are input to a Butler matrix circuit e via d _{1 to} d _M , and N orthogonal multi-beams are formed in the elevation plane through the Butler matrix circuit e.

Thus, according to this antenna device, M × N orthogonal multi-beams are formed on the azimuth plane and the elevation plane.

(Problems to be Solved by the Invention) In such a conventional antenna device, since the beams of the antenna elements are made orthogonal to each other by using a Butler matrix, the decrease in gain can be suppressed relatively small. However, since the control of the directing direction is restricted, it is impossible to direct the formed beam in an arbitrary direction with high accuracy. It is also very difficult to control the side lobes of each beam independently. These problems are the same even when a Fourier transform circuit (for example, FFT) having the same function as the Butler matrix circuit is used as the multibeam forming means.

The present invention has been made in view of such circumstances,
A high-gain multi-beam can be formed in any direction with high precision, and the pattern of each beam can be controlled independently, and mutual interference of these beams can be reliably avoided. It is an object to provide a multi-beam antenna device.

[Configuration of the invention]

(Means for Solving the Problems) According to the present invention, first arithmetic means for generating complex weight data for beam scanning according to a desired beam pattern corresponding to each of the element signals of the antenna element,
Based on the generated complex weight data, the complex weight data for beam scanning corresponding to each of the desired beam patterns is corrected so as to form a null in the peak direction of each of the other beams. 2 and at least beam signal forming means for weighting each of the element signals with the corrected complex weight data, and combining and adding these weighted signals to form a beam signal. I do.

(Operation) If the above-described beam signal formation is performed using the complex weight data generated by the first calculation means, multi-beams can be formed independently and in any direction with high accuracy. Is at least reached. Therefore, if the complex weight data generated by the first arithmetic means is corrected through the second arithmetic means as described above, and the corrected complex weight data is used to form a beam signal similar to the above, Each beam is formed independently and in any direction with high precision,
Nulls are formed in the peak directions of the other beams, and these beams do not interfere with each other.

(Embodiment) FIGS. 1 to 4 show an embodiment of a multi-beam antenna device according to the present invention.

As shown in FIG. 1, the antenna device according to this embodiment is roughly divided into antenna elements 10 11 to 10 1M, 10 21 to 10 2 M,..., 10 N1 to 10 NM arranged in a plane at predetermined intervals. When,
A transmission / reception (T / R) module 2011-20 1M, 20 21-20 2M,..., 20 N1-20 NM for transmitting and receiving a high frequency (RF) signal and converting and extracting the received signal. Azimuth plane circuit board 30 1 to form multiple beams in the azimuth plane
30N, an elevation plane circuit board 501 to 50M for forming multiple beams in the elevation plane, and a transmission signal exciter 6 for generating a transmission signal
0, an elevation plane transmission signal distributor 70 that distributes transmission signals in the elevation direction, and azimuth plane transmission signal distributors 401 to 40N that distribute transmission signals in the azimuth direction.

Among them, the T / R modules 20 11 to 20 1M, 20 2
As shown in FIG. 2, 1 to 202M,..., 20N1 to 20NM receive the transmission signal and give its signal phase from the corresponding one of the azimuth plane circuit boards 301 to 30N. Phase shifter 21 for shifting the phase as required according to the phase data to be obtained, a high power amplifier 22 for amplifying the phase-controlled transmission signal to a high power signal, and supplying the amplified transmission signal to each corresponding antenna element. A circulator 23, an RF amplifier 24 for amplifying a high-frequency (RF) signal received by the antenna element and taken out through the circulator 23; an intermediate frequency (IF) obtained by mixing the amplified RF signal with a local oscillation signal OSC1;
A mixer 25 that converts the signal into a signal, an IF reception processor 26 that removes unnecessary frequency components from the converted IF signal,
The signals subjected to IF reception processing are mixed with the local oscillation signals OSC2 having different phases by 90 ° provided through the hybrid 27 to perform phase detection of the same IF signal, that is, the same IF
Mixers 28 and 29 for extracting quadrature components I and Q (I and Q represent real and imaginary parts, respectively) from the signal. The azimuth plane circuit boards 301 to 30N Multiple analog-to-digital converters 31 that convert the output (received signal) of the / R module to digital data respectively
1 to 31M, a plurality of delay units 32 1 to 32M that delay the output data of each analog / digital converter 31 1 to 31M separately with each set different delay time, in any beam pointing direction when transmitting Generate initial phase data according to
At the time of reception, a beam scanning calculator 33 that calculates initial weight data according to an arbitrary beam directing direction. At the time of transmission, the initial phase data by the beam scanning calculator 33 is used to set a null ( Null) is calculated in accordance with the beam pattern that forms a beam pattern, and a beam that forms a null with respect to the peak direction of another beam using the initial weight data by the same beam scanning calculator 33 during reception. Through a null weight calculator 34 for calculating weight data according to a pattern, and a so-called systolic array circuit, the delay units 32 1 to 32
While weighting the output data sequence of M by the weight data calculated by the null weight calculator 34,
The weighted data is sequentially and cumulatively added to form a beamformer 35 for forming a multi-beam on the azimuth plane, and the elevation plane circuit boards 501 to 50M are configured with the azimuth plane circuit board 30. The operation result of each beamformer 35 in 1 to 30N is input and the delay unit 32 1 is input.
As in the case of ~ 32M, a plurality of delay units 511 to 51N for delaying each of them separately with different delay times set in stages, beam scanning for calculating initial weight data according to an arbitrary beam directing direction on the elevation plane Arithmetic unit 52, a null weight arithmetic unit 53 that calculates weight data according to a beam pattern that forms a null for the peak direction of another beam using the initial weight data by the beam scanning arithmetic unit 52, Then, similarly to the beam former 35, through the so-called systolic array circuit, the delay units 51 1 to 51 1 to
A beamformer 54 that forms a multi-beam on the elevation plane by sequentially accumulating the weighted data while weighting each of the output data strings of 51N with the weight data calculated by the null weight calculator 53, And each is configured. The configuration of the beam former 35 or 54 in the azimuth plane circuit boards 301 to 30N and the elevation plane circuit boards 501 to 50M is as follows.
FIG. 3 shows the beam scanning calculator 33 or 52 and the null weight calculator 34 or 53 in detail. However, in FIG. 3, for convenience, the configuration of the beam former 35 in the azimuth plane circuit boards 301 to 30N is shown as a representative. FIG. 4 shows this beamformer 35 (or
The detailed configuration of each operation cell (S11 to SMN) constituting 54) is shown for reference. In FIG. 4, Sa
Denotes a multiplier (weighting) device, and Sb denotes an adder. Also, the suffixes I and Q of the input and output signals indicate the real part and the imaginary part of the received signal orthogonal component described above for the T / R module (FIG. 2), respectively.

Hereinafter, the operation of the thus configured antenna device of the embodiment will be described in detail.

 First, the operation at the time of transmission will be described.

At the time of transmission, the transmission signal exciter 60 generates, for example, a pulsed transmission signal. The generated transmission signal is input to the elevation plane transmission signal distributor 70, where it is divided into N in the elevation direction and input to each of the azimuth plane transmission signal distributors 401 to 40N. The azimuth plane transmission signal distributors 401 to 40N further divide the transmission signals input thereto into M, and transmit the signals to the T / R modules 201 1 to 201M, 20 21 to 202M, ..., 20N1 to 20NM. This distributed transmission signal is supplied to each corresponding module (more precisely to its phase shifter 21).

On the other hand, each beam scanning calculator 33 of the azimuth plane circuit boards 301 to 30N generates a plurality of independent initial phase data corresponding to the direction in which each beam is directed for the required number of beams, and nullifies this data. Output to the weight calculator 34.
The null weight calculator 34 generates a plurality of phase data such that each beam forms a null near the peak direction of another beam based on the initial phase data input from the beam scanning calculator 33. . For this, for example, the following algorithm is used (see Suzuki and Chiba, "Pattern Forming Method Using Only Phase Amount", IEICE Technical Report, AP85-64 (October 17, 1985)).

That is, the phase of the n-th element repeatedly calculated ν times is Then Depending on the desired phase data Is required. Here, Where μ: convergence coefficient, N: number of elements, M: number of null points yn, zn: y, z coordinates of nth element θm, ψm: direction of mth null point An: amplitude of nth element Weight.

As described above, the operation of generating the phase data in the beam scanning calculator 33 and the null weight calculator 34 is repeatedly executed for each beam based on the desired directional content of all the beams. For example, when the desired number of beams is P, the beam scanning calculator 33 and the null weight calculator 34 perform the procedures shown in FIGS. 5 (a) and 5 (b) respectively.
Generate phase data corresponding to each beam.

Incidentally, in the beam scanning calculator 33, as shown in FIG. 5 (a), P through an appropriate external input means.
Depending on the input of directional data for each of the beams, q
The initial phase data of the q-th beam is calculated from the beam direction of the (q: arbitrary value, 1 ≦ q ≦ P), and the calculated initial phase data of the q-th beam and the direction data of the other beams are null-weighted. The operation of outputting to the arithmetic unit 34 is repeated P times corresponding to each beam, and the other null weight arithmetic unit 34, as shown in FIG. Each time the calculated initial phase data of the q-th beam and the direction data of the other beam are given, the peak direction of the other beam (preferably covering the main lobe) corresponding to the q-th beam. For example, by calculating the phase data that can form a null with respect to the width (for example, by repeating the above operation (1)), and outputting the calculated phase data to each corresponding T / R module. This is repeated P times corresponding to each beam.

Now, the T / R modules 21 11 to 20 1M, 20 21 to 202 M,..., To which the transmission signals distributed as described above are supplied and the phase data thus generated are sequentially added.
At 20 N1 to 20 NM (see FIG. 2), the transmission signal is time-divided by the number of beams through the phase shifter 21, and
Each of them is provided with a phase gradient corresponding to the phase data, and after amplifying the transmission signal with the phase gradient through the high power amplifier 22 as required, the circulator
The array antenna elements 10 11 to 10 1M, 10 21 to 10 2 M,..., 10 N1 to 10
It operates to supply each corresponding element of NM.
As a result, each of these transmission signals is radiated as radio waves,
On the front surface of the antenna device of this embodiment, a beam that lasts for the length of the time-divided transmission signal is time-switched and is formed as a multi-beam whose directivity is independently controlled. Become like Moreover, these beams all form nulls near the peak directions of other beams, and do not interfere with each other.

Next, an operation at the time of reception of the antenna device of the embodiment will be described.

The above M × N array antenna elements 10 11 to 10 1M, 10
.., 10 N11 to 10 NM are arranged at equal intervals in a plane, and upon reception, radio-frequency (RF) signals obtained through these antenna elements are respectively T / R modules 201 1 to
20 1M, 20 21 to 20 2M, ..., 20 N1 to 20 NM are input to the corresponding modules. As shown in FIG. 2, these T / R modules convert the obtained RF signal into a circulator
The RF signal is amplified through an RF amplifier 24, and the amplified RF signal is mixed with a local oscillation signal OSC1 in a mixer 25 to convert the RF signal into an intermediate frequency (IF) signal.
After removing unnecessary frequency components from the converted IF signal through the IF reception processor 26, the reception-processed IF signal is input to the mixers 28 and 29, and the above-described IF signal is subjected to phase detection. From these T / R modules, signals indicating the quadrature components I and Q of these IF signals are respectively extracted. Thus each T / R module 20
11-20 1M, 20 21-20 2M,..., 20 N1-20 Each signal of the I and Q components extracted from the NM is then input to each corresponding one of the azimuth plane circuit boards 301-1N. . In each of these azimuth plane circuit boards, each input signal is converted into a digital signal (time-series data X1) by an analog / digital converter 311 to 31M.
(N1) to XM (n) (each consisting of (XI, XQ). The subscripts I and Q represent real and imaginary parts, respectively.) As described above, they are taken into the beamformer 35 with a certain delay from each other.

As shown in FIG. 3, the beamformer 35 is configured by arranging operation cells S11 to SMN in M rows and N columns, and the operation cells S11 to SM1 in the first row are respectively Delay device 32 1
The time series data X1 (n) to XM (n) from .about.32M are sequentially input, and the time series data of the previous row are sequentially input from the next stage. Each of the operation cells S11 to SMN is a null weight operation unit.
The complex weight data W11 to WMN from S34 are also input.

Here, each of the operation cells S11 to SNM has a memory function (not shown), and the null weight operation unit 35
The above-mentioned complex weight data w11 to wNM are temporarily stored. In addition, the arithmetic structure is, as shown in FIG.
x in is (X Iin, X Qin) and the operation result y in from the front row is (Y
When Iin, YQin) and the complex weight data w are (WI, WQ), the output data yout = (YIout, YQout) is calculated by the following equation.

Y Iout = X Iin · WI-X Qin · W Q + Y Iin ... (2) Y Qout = X Iin · W Q + X Qin · W I + Y Qin ... (3) Note that I and Q in the left subscript are real parts, respectively. , And imaginary parts, and the right subscripts in and out represent an input signal and an output signal, respectively.

The sampling frequencies of the analog-to-digital converters 31 1 to 31 M and the delay amounts of the delay units 32 1 to 32 M are set in accordance with the operation speeds of the operation cells S 11 to SNM, respectively.

On the other hand, each beam scanning calculator 33 on the same azimuth plane circuit board 301 to 31N, at the time of the reception, sets a plurality of independent initial weight data (independent of the required number of beams according to the directing direction of each beam). It generates complex weight data and outputs it to the null weight calculator 34. Thus, the null weight calculator 34, based on the initial weight data input from the beam scanning calculator 33, responds to a beam pattern that forms a null near the peak direction of each of the other beams. Complex weight data
Generate W11 to WNM. For this, for example, the following algorithm is used (see Ohm's “Antenna Engineering Handbook”, page 228 of the Institute of Electronics and Communication Engineers).

That is, the complex weight of the n-th element repeatedly calculated ν times is Then The desired complex weight data Is required. Here, Here, μa: convergence coefficient, N: number of elements, M: number of null points S: steering vector dn: distance from the origin of the nth element θm: direction of the mth null point

As described above, the operation of generating the complex weight data at the time of reception in the beam scanning calculator 33 and the null weight calculator 34 is repeatedly executed for each of the beams based on the desired directional content of all the beams. For example, when the desired number of beams is P, the beam scanning calculator 33 and the null weight calculator 34 perform the procedures shown in FIGS. 6 (a) and 6 (b), respectively. With this, phase data corresponding to each beam is generated.

Incidentally, in the beam scanning calculator 33, as shown in FIG. 6A, P through an appropriate external input means is used.
Depending on the input of directional data for each of the beams, q
Initial weight data of the q-th beam is calculated from the (q: arbitrary value, 1 ≦ q ≦ P) beam direction, and the calculated initial weight data of the q-th beam and the direction data of the other beams are null. The operation of outputting to the weight calculator 34 is repeated P times corresponding to each beam, and the other null weight calculator 34 outputs the beam from the beam scanning calculator 33 as shown in FIG. 6 (b). Each time the calculated initial weight data of the q-th beam and the direction data of the other beams are given, corresponding to the q-th beam,
Complex weight data that can form a null in the peak direction of another beam (preferably with a width that covers the main lobe) is calculated by, for example, repeating the above operation (4), and the calculated complex weight is calculated. The operation of outputting data to each corresponding arithmetic cell of the beam former 35 is also performed by the P
Repeat several times.

Now, as described above, the time-series received digital data X1 (n) to XM delayed stepwise by the delay units 321 to 32M.
The beamformer 35 to which (n) is input and to which the complex weight data W11 to WMN generated in this way from the null weight calculator 34 are provided, based on the above equations (2) and (3), Perform weighting of each of the received digital data with each corresponding complex weight data, and successive cumulative addition of the weighted data. As a result, a plurality of beams whose directional directions are independently controlled on the azimuth plane, that is, reception multi-beams are formed. Of course, all of these beams also form nulls near the peak directions of other beams, and do not interfere with each other.

On the other hand, the elevation plane circuit boards 501 to 50M receive the output data (beam signals b1 (1) to bN (n) of the same columns of the beamformers 35 of the azimuth plane circuit boards 301 to 30N, respectively. Are input to the beamformer 54 after being delayed by the delay units 511 to 51N.
Has exactly the same configuration as the beamformer 35 of the azimuth plane circuit boards 301 to 30N except that the number of rows and the number of columns are reversed, and therefore the description of the beamformer 54 is omitted. Of course, this circuit board
The functions and operations of the beam scanning calculator 52 and the null weight calculator 53 in the range of 1 to 50M are also the same as those of the beam scanning calculator 33.
And the null weight calculator 34 have the same functions and operations at the time of reception.

As a result, a multi-beam is formed in any direction on both the azimuth plane and the elevation plane. Moreover, in this case, the directional directions of the multi-beams, the manner of removing mutual interference, and the beam pattern such as the side lobe of each beam are initialized and calculated through the beam scanning calculators 33 and 52 and the null weight calculators 34 and 53. Arbitrarily controlled by complex weight data.

FIGS. 7 and 8 each show a multi-beam formed by the conventional multi-beam antenna device and a multi-beam formed by the above-described antenna device in comparison with each other.

For example, if it is assumed that two beams are formed for both transmission and reception, a beam (two multi-beams) formed through a conventional antenna device is transmitted as shown in FIGS. 7 (a) and 7 (b). Beam 1, receive beam 1
For each beam direction, there are side lobes of the transmission beam 2 and the reception beam 2, and conversely, for each beam direction of the transmission beam 2 and the reception beam 2, the side lobes of the transmission beam 1 and the reception beam 1 also exist. Robes are present. Therefore, the two-way beam, that is, the beam obtained by multiplying both the transmission beam and the reception beam has the form shown in FIG. 7 (c). Here, 2 shown in FIG.
Paying attention to the way beam 1, the other two way beam 2
It can be seen that large side lobes are formed in the beam direction. That is, it is understood from this that the beam 1 interferes with the beam 2. The reverse is also true.

On the other hand, as shown in FIGS. 8 (a) and 8 (b), the beam (two multi-beams) formed through the antenna device of the above embodiment has both the transmission beam and the reception beam directed by the other beam. Null occurs in the direction. Therefore, in this case, as shown in FIG. 8 (c), the two-way beam also has a null in the direction of the other beam. As a result, it can be seen that interference between these beams is avoided.

Needless to say, such an effect by the antenna apparatus of the embodiment can be similarly obtained even when the number of beams is further increased.

As described above, according to the multi-beam antenna device having the above configuration, by adjusting the phase data by an appropriate algorithm, a transmission multi-beam can be formed in an arbitrary direction, and the complex weight data can be formed by an appropriate algorithm. By adjusting, it is possible to form a reception multi-beam in any direction of the azimuth plane and elevation plane,
Depending on the increase in the number of data bits, it is easy to increase the precision. In addition, since interference between beams does not occur in transmission and reception regardless of the direction of each beam, extremely stable operation is guaranteed.

In the above embodiment, both the transmission beam forming system and the receiving beam forming system have a function of forming a null with respect to the peak direction of each of the other beams. Even if only these functions are provided, a sufficient effect equivalent to the above can be obtained.

Further, in the above embodiment, the case where the antenna device according to the present invention is applied to a planar array has been described, but the antenna device according to the present invention may be applied to a linear array in which the arrangement of the antenna elements is linear. The present invention can be applied to beam formation in a direction perpendicular to a straight line, and can also be applied to an array on an arbitrary plane when the array of antenna elements is arranged in a horizontal direction and a vertical direction. Also, it goes without saying that the beam formation on the elevation plane may be performed before the beam formation on the azimuth plane.

Further, in the above embodiment, the respective circuits related to the beam control are separately provided on the azimuth plane circuit board and the elevation plane circuit board, respectively. It can also be used for chemical conversion. Further, in particular, when performing the arithmetic processing for generating the phase data and the complex weight data, it is also possible to use a ROM (Read Only Memory) or the like in which each data is tabulated in advance.

〔The invention's effect〕

As described above, according to the present invention, a multi-beam having a high gain that does not cause mutual interference is provided in an arbitrary direction,
And it can be formed with high precision. Moreover, the pattern of each beam can be controlled independently.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an overall configuration of a multi-beam antenna device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a T / R module of the embodiment device shown in FIG. 3 is a block diagram showing a specific configuration, and FIG.
FIG. 5 is a block diagram showing a specific configuration of the beam forming device of the embodiment, and FIG. 4 is a block diagram showing a cell configuration of each operation cell in the beam forming device shown in FIG. 3, and FIG. Is a flowchart showing an operation example at the time of transmission in the beam scanning calculator and the null weight calculator of the embodiment apparatus shown in FIG. 1. FIG. 6 is a flowchart showing the operation at the time of reception in the beam scanning calculator and the null weight calculator. FIG. 7 is a flowchart showing an operation example, FIG. 7 is a diagram showing a multi-beam mode formed by a conventional multi-beam antenna apparatus, and FIG. 8 is a multi-beam mode formed by the embodiment apparatus shown in FIG. FIG. 9 is a schematic perspective view showing a configuration example of a conventional multi-beam antenna device. 10 11 to 10 1M, 10 21 to 10 2M,…, 10 N1 to 10NM …… Array antenna element, 20 11 to 20 1M, 21 21 to 202M,…, 20 N1 to 20NM …… T / R module , 21 ... Phase shifter, 22 ... High power amplifier, 23 ... Circulator, 24 ... RF amplifier, 25,28,29 ... Mixer, 26 ...
… IF reception processor, 27 …… 90 ° hybrid, 30 1-30N
… Azimuth plane circuit board, 31 1 to 31M …… Analog to digital converter, 32 1 to 32M, 511 to 51N …… Delay device, 33,52…
Beam scanning calculator, 34, 53 ... Null weight calculator, 35,
54 ... Beamformer, 401 to 40N ... Azimuth direction transmission signal distributor, 501 to 50M ... Elevation plane circuit board, 60 ... Transmission signal exciter, 70 ... Elevation direction transmission signal distributor.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yoshitaka Sasaki 1 Komukai Toshiba-cho, Koyuki-ku, Kawasaki-shi, Kanagawa Prefecture Toshiba Komukai Plant (56) References JP-A-63-186176 (JP, A) JP-A 51-72259 (JP, A) MICROWAVE JOURNAL L, JAN. 1987 p. 107-120

Claims (2)

(57) [Claims] 1. A multi-beam antenna device for forming a multi-beam by processing element signals of respective antenna elements constituting an array antenna as required, wherein complex weight data for beam scanning according to a desired beam pattern is stored in the multi-beam antenna apparatus. First calculating means for generating each of the element signals; and based on the generated complex weight data, each of the desired beam patterns is formed so as to form a null in the peak direction of the other beam. Second arithmetic means for correcting the complex weight data for the corresponding beam scanning, weighting each of the element signals with the corrected complex weight data, and combining and adding these weighted signals to obtain a beam signal Beam signal forming means for forming, and a multi-beam antenna device comprising: Place. 2. The multi-beam antenna apparatus according to claim 1, wherein said multi-beam antenna device generates phase data corresponding to each directional direction of said multi-beam corresponding to each of transmission signals supplied to each of said antenna elements. Based on the generated phase data, a fourth calculating means for correcting the phase data corresponding to each of the arbitrary directional directions so as to form a null with respect to the peak direction of each of the other beams; The multi-beam according to claim 1, further comprising: transmission control means for controlling a phase shift of each of the transmission signals using the obtained phase data, and supplying the phase-shifted transmission signals to the corresponding antenna elements. Antenna device.